passepartout/org/gateway-tui-main.org

Passepartout TUI — Controller

• Controller
  • Contract
  • Event Handlers
  • Daemon Communication
  • Connection
  • Main Loop
• Test Suite

Controller

Event handlers + daemon I/O + main loop.

Contract

1. (on-key ch): dispatches key presses: Enter triggers send (extracts input buffer, pushes history, sends to daemon, clears buffer), \\ + Enter inserts a literal newline (multi-line input), /help lists all commands, /eval <expr> evaluates a Lisp expression, /focus <proj> switches project context, /scope <scope> changes context scope, /unfocus pops context, Tab completes command names, Backspace deletes, arrows scroll chat and history. Non-printable keys are ignored.
2. (on-daemon-msg msg): processes inbound daemon messages. Routes text responses to chat display (:agent), handshake to system messages, routes errors to log via log-message.
3. (send-daemon msg): serializes and sends a message to the daemon over the framed TCP protocol.
4. (tui-main): the main loop — connects to daemon, initializes Croatoan windows, optionally starts Swank REPL, runs render/input event loop at ~30fps.

Event Handlers

(in-package :passepartout.gateway-tui)

(defun on-key (&rest args)
  ;; Normalize: get-char returns raw ncurses integer codes (e.g. 263 for
  ;; backspace). Croatoan's code-key + key-name convert them to keywords
  ;; so the cond below can use eq.
  (let* ((raw (car args))
         (ch (if (and (integerp raw) (> raw 255))
                 (let* ((k (code-key raw))
                        (name (and k (key-name k))))
                   (or name raw))
                 raw)))
    (cond
      ;; Enter
      ((or (eq ch :enter) (eql ch 13) (eql ch 10)
           (eql ch #\Newline) (eql ch #\Return))
        ;; Multi-line: if buffer ends with \, strip it and insert newline
        (if (and (st :input-buffer) (eql (first (st :input-buffer)) #\\))
            (progn (pop (st :input-buffer))
                   (push #\Newline (st :input-buffer))
                   (setf (st :dirty) (list nil nil t)))
            (let ((text (string-trim '(#\Space #\Tab) (input-string))))
              (when (> (length text) 0)
                (push text (st :input-history))
                (setf (st :input-hpos) 0)
                (setf (st :scroll-offset) 0)
                (cond
                  ;; /help command
                  ((string-equal text "/help")
                   (add-msg :system
                    "/eval <expr>   Evaluate Lisp expression")
                   (add-msg :system
                    "/focus <proj>  Set project context")
                   (add-msg :system
                    "/scope <s>     Change scope (memex/session/project)")
                   (add-msg :system
                    "/unfocus       Pop context stack")
                   (add-msg :system
                    "/theme         Show current color theme")
                   (add-msg :system
                    "/help          Show this help")
                   (add-msg :system
                    "\\ + Enter      Multi-line input"))
                  ;; /theme command
                  ((string-equal text "/theme")
                   (add-msg :system
                    (format nil "Theme: user=~a agent=~a system=~a input=~a"
                            (getf *tui-theme* :user)
                            (getf *tui-theme* :agent)
                            (getf *tui-theme* :system)
                            (getf *tui-theme* :input))))
                  ;; /eval command
                  ((and (>= (length text) 6)
                        (string-equal (subseq text 0 6) "/eval "))
                   (handler-case
                       (let* ((*read-eval* t)
                              (*package* (find-package :passepartout.gateway-tui))
                              (r (eval (read-from-string (subseq text 6)))))
                         (add-msg :system (format nil "=> ~s" r)))
                     (error (c) (add-msg :system (format nil "=> ✗ ~a" c)))))
                  ;; /focus <project> — set project context
                  ((and (>= (length text) 7)
                        (string-equal (subseq text 0 7) "/focus "))
                   (let ((project (string-trim '(#\Space) (subseq text 7))))
                     (if (and (fboundp 'focus-project) (> (length project) 0))
                         (progn (funcall 'focus-project project nil)
                                (add-msg :system (format nil "Focused on project: ~a" project)))
                         (add-msg :system "Usage: /focus <project-name>"))))
                  ;; /scope <scope> — change context scope
                  ((and (>= (length text) 7)
                        (string-equal (subseq text 0 7) "/scope "))
                   (let ((scope-str (string-trim '(#\Space) (subseq text 7))))
                     (cond
                       ((and (fboundp 'focus-session) (string-equal scope-str "session"))
                        (funcall 'focus-session)
                        (add-msg :system "Scope: session"))
                       ((and (fboundp 'focus-project) (string-equal scope-str "project"))
                        (funcall 'focus-project nil nil)
                        (add-msg :system "Scope: project"))
                       ((and (fboundp 'focus-memex) (string-equal scope-str "memex"))
                        (funcall 'focus-memex)
                        (add-msg :system "Scope: memex"))
                       (t (add-msg :system "Usage: /scope memex|session|project")))))
                  ;; /unfocus — pop context
                  ((and (>= (length text) 8)
                        (string-equal (subseq text 0 8) "/unfocus"))
                   (if (fboundp 'unfocus)
                       (progn (funcall 'unfocus)
                              (add-msg :system "Popped context"))
                       (add-msg :system "Context manager not loaded")))
                  ;; Normal message
                  (t
                   (add-msg :user text)
                   (setf (st :busy) t)
                   (send-daemon (list :type :event
                                     :payload (list :sensor :user-input :text text)))))
                (setf (st :input-buffer) nil)
                (setf (st :dirty) (list t t t))))))
       ;; Tab — command completion
       ((or (eql ch 9) (eq ch :tab))
        (let ((text (input-string)))
          (when (and (> (length text) 1) (eql (char text 0) #\/))
            (let* ((cmds '("/eval" "/focus" "/scope" "/unfocus" "/help" "/theme"))
                   (match (find text cmds :test
                                (lambda (in cmd)
                                  (and (>= (length cmd) (length in))
                                       (string-equal cmd in :end1 (length in)))))))
              (when match
                (setf (st :input-buffer) (reverse (coerce match 'list)))
                (when (member match '("/eval" "/focus" "/scope") :test #'string=)
                  (push #\Space (st :input-buffer)))
                (setf (st :dirty) (list nil nil t)))))))
       ;; Backspace
       ((or (eq ch :backspace) (eql ch 127) (eql ch 8)
            (eql ch #\Backspace))
       (when (st :input-buffer) (pop (st :input-buffer)))
       (setf (st :dirty) (list nil nil t)))
      ;; Up arrow
      ((or (eq ch :up) (eql ch 259))
       (let* ((h (st :input-history)) (p (st :input-hpos)))
         (when (and h (< p (1- (length h))))
           (incf (st :input-hpos))
           (setf (st :input-buffer)
                 (reverse (coerce (nth (st :input-hpos) h) 'list)))
           (setf (st :dirty) (list nil nil t)))))
      ;; Down arrow
      ((or (eq ch :down) (eql ch 258))
       (when (> (st :input-hpos) 0)
         (decf (st :input-hpos))
         (let ((h (st :input-history)))
           (setf (st :input-buffer)
                 (if (and h (< (st :input-hpos) (length h)))
                     (reverse (coerce (nth (st :input-hpos) h) 'list))
                     nil))
           (setf (st :dirty) (list nil nil t)))))
      ;; PageUp
      ((or (eq ch :ppage) (eql ch 339))
       (incf (st :scroll-offset) 5)
       (setf (st :dirty) (list nil t nil)))
      ;; PageDown
      ((or (eq ch :npage) (eql ch 338))
       (setf (st :scroll-offset) (max 0 (- (st :scroll-offset) 5)))
       (setf (st :dirty) (list nil t nil)))
      ;; Printable
      (t
       (let ((chr (typecase ch
                    (character ch)
                    (integer (code-char ch))
                    (t nil))))
         (when (and chr (graphic-char-p chr))
           (push chr (st :input-buffer))
           (setf (st :dirty) (list nil nil t))))))))

(defun on-daemon-msg (msg)
  (let* ((payload (getf msg :payload))
         (text (getf payload :text))
         (action (getf payload :action)))
    (cond
      (text (setf (st :busy) nil)
            (add-msg :agent text))
      ((eq action :handshake)
       (add-msg :system (format nil "Connected v~a" (getf payload :version))))
      (t (add-msg :agent (format nil "~a" msg))))))

Daemon Communication

(defun send-daemon (msg)
  (let ((s (st :stream)))
    (when (and s (open-stream-p s))
      (handler-case
          (progn
            (format s "~a" (frame-message msg))
            (finish-output s))
        (error (c) (log-message "TUI-SEND: ~a" c))))))

(defun recv-daemon (s)
  (handler-case
      (let* ((hdr (make-string 6)) (n 0))
        (loop while (< n 6)
              do (let ((ch (read-char s nil)))
                   (unless ch (return-from recv-daemon nil))
                   (setf (char hdr n) ch) (incf n)))
        (let* ((len (parse-integer hdr :radix 16 :junk-allowed t))
               (buf (make-string (or len 0))))
          (when (and len (> len 0))
            (loop for i from 0 below len
                  do (let ((ch (read-char s nil)))
                       (unless ch (return-from recv-daemon nil))
                       (setf (char buf i) ch)))
            (let ((*read-eval* nil))
              (read-from-string buf)))))
    (error (c) (log-message "TUI-RECV: ~a" c) nil)))

(defun reader-loop (s)
  (loop while (and (st :running) (open-stream-p s))
        do (let ((msg (recv-daemon s)))
             (when msg (queue-event (list :type :daemon :payload msg))))))

Connection

(defun connect-daemon (&optional (host "127.0.0.1") (port 9105))
  (handler-case
      (let ((s (usocket:socket-connect host port :timeout 10)))
        (setf (st :stream) (usocket:socket-stream s) (st :connected) t)
        (bt:make-thread (lambda () (reader-loop (st :stream))) :name "tui-reader")
        (add-msg :system "* Connected *")
        t)
    (error (c)
      (add-msg :system (format nil "* Connection failed: ~a *" c))
      nil)))

(defun disconnect-daemon ()
  (when (st :stream)
    (ignore-errors (close (st :stream)))
    (setf (st :stream) nil (st :connected) nil)
    (add-msg :system "* Disconnected *")))

Main Loop

(defun tui-main ()
  (init-state)
  (with-screen (scr :input-blocking nil :input-echoing nil :cursor-visible nil)
    (let* ((h (or (height scr) 24))
           (w (or (width scr) 80))
           (sw (make-instance 'window :height 3 :width (- w 2) :y 0 :x 1))
           (ch (- h 5))
           (cw (make-instance 'window :height ch :width (- w 2) :y 3 :x 1))
           (iw (make-instance 'window :height 1 :width (- w 2) :y (- h 1) :x 1))
           (swank-port (or (ignore-errors
                             (parse-integer (uiop:getenv "TUI_SWANK_PORT")))
                           4006)))
       (setf (function-keys-enabled-p iw) t
             (st :dirty) (list t t t))
       (connect-daemon)
       (when (> swank-port 0)
         (handler-case
             (progn
               (ql:quickload :swank :silent t)
               (funcall (find-symbol "CREATE-SERVER" "SWANK")
                        :port swank-port :dont-close t)
               (add-msg :system
                        (format nil "* Swank ~d  M-x slime-connect *" swank-port)))
           (error ()
             (add-msg :system "* Swank unavailable *"))))
       ;; Initial render before the main loop — otherwise the screen stays
       ;; blank until the first keystroke (get-char blocks).
       (redraw sw cw ch iw)
       (refresh scr)
       (loop while (st :running) do
        (dolist (ev (drain-queue))
          (when (eq (getf ev :type) :daemon)
            (on-daemon-msg (getf ev :payload))))
        (let ((ch (get-char iw)))
          (when (and ch (not (equal ch -1)))
            (on-key ch)))
        (redraw sw cw ch iw)
        (refresh scr)
        (sleep 0.03))
       (disconnect-daemon))))

Test Suite

(eval-when (:compile-toplevel :load-toplevel :execute)
  (ql:quickload :fiveam :silent t))

(defpackage :passepartout-tui-tests
  (:use :cl :passepartout :passepartout.gateway-tui)
  (:export #:tui-suite))

(in-package :passepartout-tui-tests)

(fiveam:def-suite tui-suite :description "Verification of the TUI model and event handling")
(fiveam:in-suite tui-suite)

(fiveam:test test-init-state
  "Contract model.1: init-state returns fresh state plist with required keys."
  (init-state)
  (fiveam:is (eq t (st :running)))
  (fiveam:is (eq :chat (st :mode)))
  (fiveam:is (eq nil (st :connected)))
  (fiveam:is (eq nil (st :stream)))
  (fiveam:is (eq nil (st :messages)))
  (fiveam:is (eq 0 (st :scroll-offset)))
  (fiveam:is (eq nil (st :busy))))

(fiveam:test test-add-msg
  "Contract model.2: add-msg appends a message with role, content, and time."
  (init-state)
  (add-msg :user "hello")
  (let* ((msgs (st :messages))
         (msg (first msgs)))
    (fiveam:is (eq :user (getf msg :role)))
    (fiveam:is (string= "hello" (getf msg :content)))
    (fiveam:is (stringp (getf msg :time)))
    (fiveam:is (= 5 (length (getf msg :time))))))

(fiveam:test test-add-msg-dirty-flag
  "Contract model.2: add-msg sets dirty flags for status and chat."
  (init-state)
  (setf (st :dirty) (list nil nil nil))
  (add-msg :system "boot")
  (let ((dirty (st :dirty)))
    (fiveam:is (eq t (first dirty)))
    (fiveam:is (eq t (second dirty)))
    (fiveam:is (eq nil (third dirty)))))

(fiveam:test test-queue-event-roundtrip
  "Contract model.3: queue-event + drain-queue preserves events in order."
  (init-state)
  (queue-event '(:type :key :payload (:ch 13)))
  (queue-event '(:type :daemon :payload (:text "hi")))
  (let ((evs (drain-queue)))
    (fiveam:is (= 2 (length evs)))
    (fiveam:is (equal '(:type :key :payload (:ch 13)) (first evs)))
    (fiveam:is (equal '(:type :daemon :payload (:text "hi")) (second evs)))
    (fiveam:is (null (drain-queue)))))

(fiveam:test test-on-key-enter-sends-user-message
  "Contract 1: on-key with Enter extracts input, adds user message, clears buffer."
  (init-state)
  ;; Simulate typing "test"
  (dolist (ch '(#\t #\e #\s #\t))
    (on-key (char-code ch)))
  (fiveam:is (string= "test" (input-string)))
  ;; Simulate Enter key — ncurses returns 343 (KEY_ENTER) when keypad is enabled
  (on-key 343)
  ;; Input buffer should be cleared
  (fiveam:is (string= "" (input-string)))
  ;; A user message should be in the message list
  (let ((msgs (st :messages)))
    (fiveam:is (>= (length msgs) 1))
    (let ((last (first msgs)))
      (fiveam:is (eq :user (getf last :role)))
      (fiveam:is (string= "test" (getf last :content))))))

(fiveam:test test-on-key-eval-command
  "Contract 1: on-key handles /eval command and displays result."
  (init-state)
  ;; Type "/eval (+ 1 2)"
  (dolist (ch (coerce "/eval (+ 1 2)" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (let ((msgs (st :messages)))
    (fiveam:is (>= (length msgs) 1))
    (let ((last-msg (first msgs)))
      (fiveam:is (eq :system (getf last-msg :role)))
      (fiveam:is (search "=> 3" (getf last-msg :content))))))

(fiveam:test test-on-key-backspace
  "Contract 1: on-key with Backspace removes last character from buffer."
  (init-state)
  (dolist (ch '(#\a #\b #\c))
    (on-key (char-code ch)))
  (fiveam:is (string= "abc" (input-string)))
  ;; ncurses returns 263 (KEY_BACKSPACE) when keypad is enabled
  (on-key 263)
  (fiveam:is (string= "ab" (input-string))))

(fiveam:test test-on-key-focus-command
  "Contract 1: /focus command parses project name."
  (init-state)
  (dolist (ch (coerce "/focus myapp" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (let ((msg (first (st :messages))))
    (fiveam:is (eq :system (getf msg :role)))))

(fiveam:test test-on-key-scope-command
  "Contract 1: /scope command with valid argument."
  (init-state)
  (dolist (ch (coerce "/scope memex" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (let ((msg (first (st :messages))))
    (fiveam:is (eq :system (getf msg :role)))))

(fiveam:test test-on-key-unfocus-command
  "Contract 1: /unfocus command dispatches correctly."
  (init-state)
  (dolist (ch (coerce "/unfocus" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (let ((msg (first (st :messages))))
    (fiveam:is (eq :system (getf msg :role)))))

(fiveam:test test-on-key-tab-completion
  "Contract 1: Tab completes / commands when input starts with /."
  (init-state)
  (dolist (ch (coerce "/ev" 'list))
    (on-key (char-code ch)))
  (on-key 9)
  (fiveam:is (string= "/eval " (input-string))))

(fiveam:test test-on-key-tab-no-slash
  "Contract 1: Tab does nothing when input doesn't start with /."
  (init-state)
  (dolist (ch (coerce "hello" 'list))
    (on-key (char-code ch)))
  (on-key 9)
  (fiveam:is (string= "hello" (input-string))))

(fiveam:test test-on-key-multiline
  "Contract 1: \\ + Enter inserts newline instead of sending."
  (init-state)
  (dolist (ch (coerce "line1" 'list))
    (on-key (char-code ch)))
  (on-key (char-code #\\))
  (on-key 343)
  (fiveam:is (search "line1" (input-string)))
  (fiveam:is (search (string #\Newline) (input-string))))

(fiveam:test test-on-key-help
  "Contract 1: /help displays command list."
  (init-state)
  (dolist (ch (coerce "/help" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (let ((msgs (st :messages)))
    (fiveam:is (>= (length msgs) 3))
    (fiveam:is (some (lambda (m) (search "/eval" (getf m :content))) msgs))))

(fiveam:test test-activity-indicator
  "Contract model: :busy flag is set on send and cleared on agent response."
  (init-state)
  (fiveam:is (eq nil (st :busy)))
  ;; Simulate sending a normal message (sets busy)
  (dolist (ch (coerce "hello" 'list))
    (on-key (char-code ch)))
  (on-key 343)
  (fiveam:is (eq t (st :busy)))
  ;; Simulate receiving an agent response (clears busy)
  (on-daemon-msg '(:type :event :payload (:text "hi back")))
  (fiveam:is (eq nil (st :busy))))

(fiveam:test test-theme
  "Contract view: *tui-theme* provides color mappings."
  (fiveam:is (eq :green (getf *tui-theme* :user)))
  (fiveam:is (eq :white (getf *tui-theme* :agent)))
  (fiveam:is (eq :yellow (getf *tui-theme* :system)))
  (fiveam:is (eq :cyan (getf *tui-theme* :input)))
  (fiveam:is (eq :white (theme-color :unknown-role))))